phenyl groups of the dibenzylammonium with a strong electron-withdrawing trifluoromethyl group templated the synthesis of the smallest [2]rotaxane reported so far. The trifluoromethyl group not only enhances the templating effect of the dumbbell but also acts as the stopper to prevent dethreading of a [20]crown ether macrocycle.
通过用强吸电子三
氟甲基取代二苄基
铵的苯基之一获得的改性哑铃,模板化了迄今为止报道的最小的[2]轮烷。三
氟甲基不仅增强了哑铃的模板效果,而且还充当了阻止[20]
冠醚大环脱线的塞子。